Physics Test 11...

A 1 kg block is being pushed against a wall by a force F = 75 N as shown in the Figure. The coefficient of friction is 0.8. The magnitude of acceleration of the block is:

In the figure shown, find the accelerations of blocks A, B and C immediately after string connecting between block B and block C is cut.

Find normal contact force between 2kg & 3kg blocks. Three blocks are pushed toward right as shown :-

An air capacitor having capacity C₀ is filled with dielectric as shown in figure, then the new capacitance of system will be

In the circuit shown here C₁ = 6μF, C₂ = 3μF and battery B = 20 V. The switch S₁ is first closed. It is then opened and afterwards S₂ is closed. What is the charge on C₂

Two air filled capacitors are connected as shown. The left capacitor is suddenly filled with a dielectric of constant K. The work done by battery after that is 24µJ. Dielectric constant K is :-

A parallel plate capacitor is charged and then disconnected from the source of steady E.M.F. The plates are then drawn apart farther. Again it is connected to the same source. Then :

Circuit shown in the figure is in steady state. Now the capacitor is suddenly filled with medium of dielectric constant K = 2.

Acceleration of blocks at given instant are a shown in the figure. Coefficient of friction between 10kg block and ground is 0.1. There is no friction between 5kg blocks and ground. Which of the following statements is/are CORRECT.

A block of mass m₁ = 2 kg and another block of mass m₂ = 3kg, are placed together (see figure) on an inclined plane with angle of inclination θ. The coefficient of static and dynamic friction between the block m₁ and the plane is always    µ = 0.2. The coefficient of static and dynamic friction between the block m₂ and the plane are equal to µ = 0.3.